This Flash program gives students endless practice on calculating the length of a line segment bounded by two points. It randomly generates ten sets of points and the corresponding answer sheets on sc...More: lessons, discussions, ratings, reviews,...

This Flash program gives students endless practice on finding the midpoint of a line segment bounded by two points. It randomly generates ten sets of points and an answer key, which you can print out ...More: lessons, discussions, ratings, reviews,...

An interactive applet and associated web page that demonstrate the concept of collinear points.
Four draggable points are shown.
Dragging any one of them will cause the others to move so the...More: lessons, discussions, ratings, reviews,...

An interactive applet and associated web page that demonstrate congruent line segments (segments that are the same length).
The applet shows three line segments that are the same length. They al...More: lessons, discussions, ratings, reviews,...

The user reviews the coordinate system and basic geometry terms associated with the coordinate plane. After viewing examples of graphing objects, users can interactively test their understanding of th...More: lessons, discussions, ratings, reviews,...

An interactive applet and associated web page that show the definition of a horizontal line in coordinate geometry.
The applet has two points that the user can drag which define a line.
The lin...More: lessons, discussions, ratings, reviews,...

An interactive applet and associated web page that show the definition of a vertical line in coordinate geometry.
The applet has two points that the user can drag which define a line.
The line ...More: lessons, discussions, ratings, reviews,...

An interactive applet and associated web page that demonstrate how to find the
distance between two points with given coordinates.
The applet has two points on a Cartesian plane. As the user ...More: lessons, discussions, ratings, reviews,...

An interactive applet and associated web page that demonstrate how to find the perpendicular
distance between a point and a line.
The applet has a line with sliders that adjust its slope and in...More: lessons, discussions, ratings, reviews,...

An interactive applet and associated web page that demonstrate how to find the perpendicular
distance between a point and a line using trigonometry, given the coordinates of the point and the sl...More: lessons, discussions, ratings, reviews,...

An interactive applet and associated web page that demonstrate how to find the perpendicular
distance between a point and a line that is either vertical or horizontal,
given the coordinates of...More: lessons, discussions, ratings, reviews,...

An interactive applet and associated web page that provide step-by-step instructions on how to
divide a line segment into any number of equal parts,
using only a compass and straightedge. The ...More: lessons, discussions, ratings, reviews,...

An interactive applet and associated web page that have the definition and meaning of "equidistant" as applied to points.
The applet shows to points and another that is equidistant from them no m...More: lessons, discussions, ratings, reviews,...

Provides Euclid's definition outlining how magnitudes can have a ratio which can be multiplied. The guide then examines the structure of the definition. The To reset the applet, press "r" while your...More: lessons, discussions, ratings, reviews,...

Provides Euclid's defition outlining how magnitudes can be organized by ratio order (greater or less than). The guide then examines the structure of the defintion. The To reset the applet, press "r"...More: lessons, discussions, ratings, reviews,...

Provides Euclid's definitions of parts and multiples of line segment magnitudes. The guide then examines the structure of these definitions. The To reset the applet, press "r" while your cursor is o...More: lessons, discussions, ratings, reviews,...

Provides Euclid's definitions outlining how magnitudes can be in ratio or proportion to one another. The guide then examines the structure of these definitions. The To reset the applet, press "r" wh...More: lessons, discussions, ratings, reviews,...

Provides Euclid's definitions dealing with magnitude ratios. The guide then examines the structure of these definitions. The To reset the applet, press "r" while your cursor is over the diagram.More: lessons, discussions, ratings, reviews,...

Provides Euclid's definitions dealing with antecedents and consequents. The guide then examines the structure of these definitions. The To reset the applet, press "r" while your cursor is over the di...More: lessons, discussions, ratings, reviews,...

This material is based upon work supported by the
National Science Foundation under Grant DUE-0226284.
Any opinions, findings, and conclusions or recommendations
expressed in this material are those of the author(s)
and do not necessarily reflect the views of the
National Science Foundation.